[jira] [Commented] (POOL-318) java.util.ConcurrentModificationException

["Gary D. Gregory (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/POOL-318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17370582#comment-17370582 ] 

Gary D. Gregory commented on POOL-318:
--------------------------------------

Also, please do try with our current release, 2.4.2 is quite old! 

> java.util.ConcurrentModificationException
> -----------------------------------------
>
>                 Key: POOL-318
>                 URL: https://issues.apache.org/jira/browse/POOL-318
>             Project: Commons Pool
>          Issue Type: Bug
>    Affects Versions: 2.4.2
>            Reporter: Sanjeev
>            Priority: Major
>
> I am using commons.pool.2.4.2 and once size of existing pool reduces to certain number, application runs perparePool()
> I can see some instances of java.util.ConcurrentModificationException in error logs.
> 	at org.apache.commons.pool2.BasePooledObjectFactory.makeObject(BasePooledObjectFactory.java:60)
> 	at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:868)
> 	at org.apache.commons.pool2.impl.GenericObjectPool.ensureIdle(GenericObjectPool.java:927)
> 	at org.apache.commons.pool2.impl.GenericObjectPool.ensureMinIdle(GenericObjectPool.java:906)
> 	at org.apache.commons.pool2.impl.GenericObjectPool.preparePool(GenericObjectPool.java:844)
> 	.....
> 	at java.lang.Thread.run(Thread.java:722)
> Caused by: java.util.ConcurrentModificationException
> 	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:894)
> 	at java.util.HashMap$EntryIterator.next(HashMap.java:934)
> 	at java.util.HashMap$EntryIterator.next(HashMap.java:932)
> 	at org.jboss.util.TimedCachePolicy.getValidKeys(TimedCachePolicy.java:364)
> 	at org.jboss.virtual.plugins.cache.IterableTimedVFSCache.findContext(IterableTimedVFSCache.java:65)
> 	at org.jboss.virtual.plugins.cache.CombinedVFSCache.findContext(CombinedVFSCache.java:116)
> 	at org.jboss.virtual.plugins.registry.DefaultVFSRegistry.getContext(DefaultVFSRegistry.java:132)
> 	at org.jboss.virtual.VFS.getVFS(VFS.java:203)
> 	at org.jboss.virtual.VFS.createNewRoot(VFS.java:228)
> 	at org.jboss.virtual.VFS.getRoot(VFS.java:244)
> 	at org.jboss.virtual.VFS.getRoot(VFS.java:313)
> 	at org.jboss.virtual.plugins.vfs.VirtualFileURLConnection.resolveVirtualFile(VirtualFileURLConnection.java:105)
> 	at org.jboss.virtual.plugins.vfs.VirtualFileURLConnection.getVirtualFile(VirtualFileURLConnection.java:118)
> 	at org.jboss.virtual.plugins.vfs.VirtualFileURLConnection.getInputStream(VirtualFileURLConnection.java:93)
> 	at org.springframework.core.io.UrlResource.getInputStream(UrlResource.java:123)
> 	at org.apache.cxf.bus.spring.BusApplicationContext.getConfigResources(BusApplicationContext.java:115)
> 	at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:107)
> 	at org.apache.cxf.bus.spring.BusApplicationContext.loadBeanDefinitions(BusApplicationContext.java:262)
> 	at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:123)
> 	at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:422)
> 	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:352)
> 	at org.apache.cxf.bus.spring.BusApplicationContext.<init>(BusApplicationContext.java:91)
> 	at org.apache.cxf.bus.spring.SpringBusFactory.createApplicationContext(SpringBusFactory.java:102)
> 	at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:93)
> 	at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:86)
> 	at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:64)
> 	at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:53)
> 	at org.jboss.wsf.stack.cxf.client.ProviderImpl.setValidThreadDefaultBus(ProviderImpl.java:60)
> 	at org.jboss.wsf.stack.cxf.client.ProviderImpl.createServiceDelegate(ProviderImpl.java:41)
> 	at javax.xml.ws.Service.<init>(Service.java:56)
> 	at javax.xml.ws.Service.create(Service.java:680)
> Application runs preparePool ()  in new thread. and next statement is to borrow instance from pool. Borrowing does not fail but few poolPrepartion fail log is in error log. 
> Any suggestions please?



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